#include<stdio.h>
#include<stdlib.h>
#include<unistd.h>

int main()
{
	printf("进程执行之前的代码：\n");
	//execl("/usr/bin/ls","ls","-l","-a",NULL);
	execl("/usr/bin/top","top",NULL);
	printf("进程执行之后的代码：\n");
	return 0;
}
